# NexaPay Merchant API Documentation ## Docs - [Authentication](https://docs.nexapay.ng/authentication.md) - [Bills](https://docs.nexapay.ng/bills.md) - [Business registration](https://docs.nexapay.ng/business-registration.md) - [Errors](https://docs.nexapay.ng/errors.md) - [Introduction](https://docs.nexapay.ng/introduction.md): Overview of the NexaPay B2B Merchant API - [Payments](https://docs.nexapay.ng/payments.md) - [Security](https://docs.nexapay.ng/security.md) - [Virtual accounts](https://docs.nexapay.ng/virtual-accounts.md) - [Webhooks](https://docs.nexapay.ng/webhooks.md): Signed outbound merchant webhook events from NexaPay - [Withdrawals](https://docs.nexapay.ng/withdrawals.md) ## OpenAPI Specs - [openapi](https://docs.nexapay.ng/api-reference/openapi.json)